My holy grail is the GMP Georgia State Patrol SSP Mustang... both my grandfather and mom were GSP so naturally it's going to be the centerpiece of my collection but the prices have been crazy on eBay for these. I did notice though that the other similar GMP police issues have been selling for a lot less... the last few GSP cars have been around $200+ while the others (Michigan, Florida, New York, etc.) have been selling between $60 and $150.

Do the prices on these fluctuate a lot? I haven't been in this hobby long enough to know what is "normal", what is a good price for this model? It seems like one comes up on eBay every few weeks so it's not like it's ultra rare or anything.... or is there something about this particular issue that makes it worth so much more?